Aplysia californica (sea slug)

Aplysia californica, commonly known as the California sea slug, is a type of marine mollusk found along the Pacific coast of North America. These soft-bodied creatures are known for their distinct colors and behaviors. They are often studied in scientific research due to their relatively simple nervous systems, which allow researchers to explore the basics of learning and memory. Aplysia can change color and retract their bodies into a protective shell-like structure when threatened. Their unique biological features and ease of laboratory observation make them a valuable model for understanding fundamental neurological processes.